Fire alarm.



B. S. HARRINGTON & S. T. ALLEN.

FIRE ALARM.

APPLICATION FILED 1330.26, 1911.

1,043,228. Patented Nov. 5, 1912.

Witnesses Inventors Attornys WEED %TATE% PATENT @Fhlfllh BERTIE S. HARRINGTON AND SAIIIUEL T. ALLEN, OF ROME, GEORGIA.

FIRE-ALARM.

Application filed December 26, 1911.

To (ZZZ whom it may concern:

Be it known that we, Bnnrm S. HARRING- TON and SAMUEL T. ALLEN, citizens of the United States, residing at Rome, in the county of Floyd, State of Georgia, have invented a new and useful Fire-Alarm, of which the following is a specification.

This invention relates to fire alarms, and has for its object to provide a simple and reliable automatic fire alarm or signal, which in case of fire the heat in the vicinity or proximity thereof rising to an abnormal degree of temperature, causes an explosion, or chain of explosions, that in turn may give a timely warning to some one and thereby give warning of existing danger from fire, to either life or property.

The main features of this invention are, that it is simple and reliable, cheap, easy to install, and after installation it requires no upkeep or inspection; it will not explode from friction or compression; it is also impervious to water and moisture, and is not dischargeable upon a momentary rise in temperature. It will last intact for generations it will not throw 0E any solid or inflammable substance that might burn anything, or hurt anyone that might be near when explo sion occurs.

To the above end this invention comprises an explosive mixture or substance that within itself or through a highly inflammable fuse used therewith, will explode when ex posed to an abnormal degree of temperature; it is preferable and more satisfactorily used within a casing comprising a novel construction, it being understood that this device is susceptible of various alterations in materials employed, (preferably of lead for the casing) or in the dimensions or shapes of the various parts, within the scope of appended claims. Said casing to have a suit able means of fastening it in any desired location. The explosive in the casing at some point or in some way is connected with a highly inflammable fuse, said fuse to have a suitable highly fusible protective covering. In action the abnormal heat caused by a fire melts the protective covering of the fuse and ignites the highly inflammable fuse, which in turn sets oif the explosive in the casing, which bursts or blows out, the report or reports thereof indicating the presence of fire.

In a novel construction this invention is illustrated in the accompanying drawings,

Specification of Letters Patent.

Patented Nov. 5, 1912.

Serial No. 667,648.

a. preferable way of constructing this article, wherein similar reference characters indicate similar parts, and wherein Figure l is an elevation of the device as applied to a wall. Fig. 2 is a front elevation thereof on an enlarged scale, and Fi 3 is a similar view shown partially in section. Referring specially to the drawing, there is designated by the numeral 6 a tubular casing, preferably of lead, having a partition 10 in the lower end thereof, which partition is provided with a lead aperture 11 extending centrally therethrough and having a shallow recess 12 of greater diameter than the aperture at the outer end of the aperture. The upper end of the tubular casing 6 is flattened as designated by the numeral 7 and an eyelet 8 is secured to the said flattened end to clamp the flattened portions together and thereby close the upper end of the casing, the said eyelet also serving as a means for suspending or attaching the casing by the engagement of an eye screw 5 therethrough. A solid and highly inflammable fuse 15 of semi-globular form abuts against the partition 10 over the aperture '11 and has an annular flange 16 projecting therefrom. The casing 6 is provided with an annular lip 17 beyond the partition 10 which, upon the fuse 15 being brought against the partition 10 is crimped inwardly to engage the flange 16 and retain the fuse in position. Prior to the application of the fuse 15 to the casing, explosive material or powder is inserted into the casing, the same being charged through the aperture 11. Upon the fuse 15 being se cured in position, a covering of rapidly fusible material, such as an alloy substance, is molded over and envelops the outer sides of the fuse 15, the same beingof suitable thickness to withstand a momentary rise in temperature.

In use, the cartridge is applied to the wall of a building or to any other object by means of the eye-screw 5, thereby permitting the cartridges to be suspended or attached in localities where fires or explosions are liable to occur, and upon the heat in the vicinity of the cartridge rising to an ab normal degree of temperature, the covering 9 by its fusion will expose the fuse 15 which being of highly inflammable material will become ignited and thereby ignite the powder within the casing 6 to cause the explosion or discharge of the cartridge. It will be seen that the casing in being suspended or attached in a vertical position causes the powder to trickle through the aperture 11 and fill the shallow recess 12 thereby exposing a greater area of powder against the fuse 5 to facilitate theignition of the powder. It will also be seen that the covering 9 will prevent the fuse from being exploded upon a mere momentary rise in temperature and that the cartridge is also impervious to water and moisture. This device is also characterized by its simplicity and cheapness in construction and by the convenience and efficiency in theuse thereof, as well as presenting an attractive and desirable article.

lVhat is claimed as new is 1. In a heat alarm, a casing, explosive material therein, a highly inflammable fuse secured to the casing to ignite the explosive material, and a fusible covering molded over the outer sides of the fuse.

In a heat alarm, a casing having a lead V aperture, explosive material in the casing, a solid highly inflammable fuse secured to the casing over the aperture, and a rapidly fusible covering fitting snugly over the outer sides of the fuse.

3. In a heat alarm, a casing, explosive material therein, a highly inflammable fuse abutting against the casing and designed to ignite the explosive material, the said fuse having a projection and the casing having means to engage the projection in order to retain the fuse in position, and a rapidly fusible covering enveloping the outer sides of the fuse.

at. In a heat alarm, a tubular casing having a partition in one end with a lead aper' ture thercthrough and a shallow recess of greater area than the aperture at the outer end of the aperture, explosive material in the casing and extending into the said recess, and a highly inflammable fuse abutting againstthe partition over the recess and aperture.

5. In a heat alarm, a tubular casing hav ing a partition in one end with a lead apertaining explosive material and having a highly inflammablefuse at one end thereof for igniting the explosive material, the other i 7 end of the casing being flattened, and; an eyelet clamping the flattened portions together to close the corresponding end of the casing and serve as a means of suspending or attaching the casing. V

7. A heat alarm comprising a'tubular casing having a partition in the lower end thereof with a lead aperture therethrough, and a shallow recess of greater area than the aperture at theouter end of the aperture, a highly inflammable fuse abuttingagainst the partition over the aperture, and having V a flange projecting therefrom, the said casing having an annular lip crimped inwardly to engage the flange, explosive material within the casing extending into the said recess, the upper end of the casing being flattened, an eyelet secured to the flattened r end of the casing, and a rapidly fusible cov I ering for the fuse 8. A heat alarm embodying a tubular cas-r ing having a partition in the lower end thereof with a lead aperture therethrough, a highly inflammable fuse abutting against the partition over the aperture and'having a flange projecting therefrom, the casing hav-' ing means for engaging the said flange, ex-

plosive material within the casing, and'a' rapidly fusible covering molded over and enveloping the outer sides of the fuse.

In testimony that we claim the foregoing as our own, we have hereto aifiXed our signa: tures in the presence of two witnesses.

BERT IE S. HARRINGTON. SAl/IUEL T. ALLEN.

W'itnesses J. l/I. HUNT, D. M. Moses.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

